test(ui): add low-confidence AccessibleTable mockup journey evidence coverage

[BigSimmo]

Adds a mockup fixture and a 320px Playwright journey asserting low-confidence AccessibleTable + MissingValue behavior for #237/#238 evidence.

Includes:

• src/app/mockups/accessible-table-browser-fixture/page.tsx
• tests/ui-tools.spec.ts (new 320px journey)

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.
To continue using code reviews, add credits to your account and enable them for code reviews in your settings.

[supabase]

This pull request has been ignored for the connected project sjrfecxgysukkwxsowpy because there are no changes detected in supabase directory. You can change this behaviour in Project Integrations Settings ↗︎.

---

Preview Branches by Supabase.
Learn more about Supabase Branching ↗︎.

[coderabbitai]

Warning

Review limit reached

You’ve reached a temporary PR review limit under our Fair Usage Limits Policy.

Your recent review volume is higher than typical usage, so adaptive limits are currently applied.

Next review available in: 22 minutes

Limit details: You’ve used all 1 included review currently available under your plan. You completed 90 included PR reviews in the past 7 days; at that activity level, included reviews refill at 1 review per hour.

Your organization has reached its usage spending cap. Adjust your spending cap in the billing tab.

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 27579e14-b1c8-4453-b547-058952129242

📥 Commits

Reviewing files that changed from the base of the PR and between fb8c71c and d6a5497.

📒 Files selected for processing (5)

• docs/branch-review-records/d545333169b6e7645c813d4f760bcc8d901cef851b57bccb7874d8d6ff114f54.record.md
• docs/design-system/adoption-manifest.json
• docs/site-map.md
• src/app/mockups/accessible-table-browser-fixture/page.tsx
• tests/ui-tools.spec.ts

---

_{Comment @coderabbitai help to get the list of available commands.}

[BigSimmo]

Codex final review

• Final head: b76bc4b426814f6d9a13be72183190acdcc82415
• Latest base: 4c52fe1dbbc921be769c31b36efbcdba798ba11b (main)
• Branch and merge tree: current with base (behind 0, ahead 3), GitHub reports mergeable: true and mergeable_state: clean; synthetic merge commit cf8d4d95af2c22ba278f7135d29c6dbfa07e3154. Auto-merge state is null and was not modified.
• Review result: no high-confidence P0–P2 PR-introduced defect was found. The source-contract and falsification passes confirmed that the fixture reaches ambiguous_generic_column, preserves exactly two blank cells, exposes the low-confidence warning, and exercises the full Not recorded mobile layout. A stale-base integration artifact introduced during the first branch-sync construction was detected by the complete-diff audit and corrected in the forward commit at the final head. The final PR delta is exactly the original four intended files plus one immutable review record: 82 additions, 0 deletions.
• Review ledger: added docs/branch-review-records/d545333169b6e7645c813d4f760bcc8d901cef851b57bccb7874d8d6ff114f54.record.md; ledger integrity and write-discipline checks passed.
• Independent review: CodeRabbit and hosted Codex review were quota-limited. A distinct manual adversarial source-contract pass found no actionable findings. Review threads remaining: 0.
• Local evidence: deterministic normalizer proof passed with ambiguous_generic_column and two missing cells. Full local repository npm/Playwright execution was unavailable because this connector-only environment had no repository checkout or network access. No live, paid, provider-backed, deployment, production, or Lighthouse gates were run.
• Exact-head required CI: PR required passed. CI, Static PR checks, Build, Unit coverage, Production UI critical, Production UI shards 1–3, SAST, and Secret Scan all passed.
• Advisory CI: Advisory UI passed, including the new 320 px mockup journey. The Lighthouse baseline refresh job was skipped.
• Blockers: none. Residual risk: no fresh automated third-party review and no local full checkout; this is mitigated by the clean final diff, separate adversarial pass, and complete exact-head CI.

The PR was not merged. Final merge is left to the user.